cam specs on an 87 350 mag
10-22-2002, 10:45 AM
#2
Gold Member
Gold Member
According to Dennis Moore the stock cam(s) are:
Mercury p/n 431-5943 non-roller type
GM p/n 340284
Duration @ .050 200I/212E
Lift @ .050 .400I/.410E
Lobe C.L. 108*ATDC/112*BTDC
Lobe seperation 110*
Mercury p/n 431-811658 roller cam
Duration @ .050 197I/207E
Lift @ .050 .430I/.450E
Lobe C.L. 106*ATDC/112*BTDC
Lobe seperation 109*
It depends on when your engine was made as which cam you have. Mine was made in late '87/early '88 and it's a non-roller. Sometime in '88, maybe early '89, they switched to a roller cam.
Mercury p/n 431-5943 non-roller type
GM p/n 340284
Duration @ .050 200I/212E
Lift @ .050 .400I/.410E
Lobe C.L. 108*ATDC/112*BTDC
Lobe seperation 110*
Mercury p/n 431-811658 roller cam
Duration @ .050 197I/207E
Lift @ .050 .430I/.450E
Lobe C.L. 106*ATDC/112*BTDC
Lobe seperation 109*
It depends on when your engine was made as which cam you have. Mine was made in late '87/early '88 and it's a non-roller. Sometime in '88, maybe early '89, they switched to a roller cam.
Last edited by Iggy; 10-22-2002 at 10:57 AM.
